PHP 实现公历日期与农历日期的互转换

示例代码：
<?php
/*

• 陈海波 新二级页面 农历转换成公历

• */
  // lunar.php 新建这个php文件，所有的代码无需改，需要改的是下面teacher.php 的几行
  class Lunar
  {
  private $SMDay = array(1 => 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31);//定义公历月分天数
  private $LStart = 1950 ;//农历从1950年开始
  private $_LMDay = array(
  //差：该年的农历正月初一到该年公历1月1日的天数；1~12：农历月份天数；闰：如有闰月，记录该月平月天数
  // 差 1 2 3 4 5 6 7 8 9 10 11 12 闰
  array(47,29,30,30,29,30,30,29,29,30,29,30,29),
  array(36,30,29,30,30,29,30,29,30,29,30,29,30),
  array(6,29,30,29,30,59,29,30,30,29,30,29,30,29), //五月29 闰五月30
  array(44,29,30,29,29,30,30,29,30,30,29,30,29),
  array(33,30,29,30,29,29,30,29,30,30,29,30,30),
  array(23,29,30,59,29,29,30,29,30,29,30,30,30,29), //三月29 闰三月30
  array(42,29,30,29,30,29,29,30,29,30,29,30,30),
  array(30,30,29,30,29,30,29,29,59,30,29,30,29,30), //八月30 闰八月29
  array(48,30,30,30,29,30,29,29,30,29,30,29,30),
  array(38,29,30,30,29,30,29,30,29,30,29,30,29),
  array(27,30,29,30,29,30,59,30,29,30,29,30,29,30), //六月30 闰六月29
  array(45,30,29,30,29,30,29,30,30,29,30,29,30),
  array(35,29,30,29,29,30,29,30,30,29,30,30,29),
  array(24,30,29,30,58,30,29,30,29,30,30,30,29,29), //四月29 闰四月29
  array(43,30,29,30,29,29,30,29,30,29,30,30,30),
  array(32,29,30,29,30,29,29,30,29,29,30,30,29),
  array(20,30,30,59,30,29,29,30,29,29,30,30,29,30), //三月30 闰三月29
  array(39,30,30,29,30,30,29,29,30,29,30,29,30),
  array(29,29,30,29,30,30,29,59,30,29,30,29,30,30), //七月30 闰七月29
  array(47,29,30,29,30,29,30,30,29,30,29,30,29),
  array(36,30,29,29,30,29,30,30,29,30,30,29,30),
  array(26,29,30,29,29,59,30,29,30,30,30,29,30,30), //五月30 闰五月29
  array(45,29,30,29,29,30,29,30,29,30,30,29,30),
  array(33,30,29,30,29,29,30,29,29,30,30,29,30),
  array(22,30,30,29,59,29,30,29,29,30,30,29,30,30), //四月30 闰四月29
  array(41,30,30,29,30,29,29,30,29,29,30,29,30),
  array(30,30,30,29,30,29,30,29,59,29,30,29,30,30), //八月30 闰八月29
  array(48,30,29,30,30,29,30,29,30,29,30,29,29),
  array(37,30,29,30,30,29,30,30,29,30,29,30,29),
  array(27,30,29,29,30,29,60,29,30,30,29,30,29,30), //六月30 闰六月30
  array(46,30,29,29,30,29,30,29,30,30,29,30,30),
  array(35,29,30,29,29,30,29,29,30,30,29,30,30),
  array(24,30,29,30,58,30,29,29,30,29,30,30,30,29), //四月29 闰四月29
  array(43,30,29,30,29,29,30,29,29,30,29,30,30),
  array(32,30,29,30,30,29,29,30,29,29,59,30,30,30), //十月30 闰十月29
  array(50,29,30,30,29,30,29,30,29,29,30,29,30),
  array(39,29,30,30,29,30,30,29,30,29,30,29,29),
  array(28,30,29,30,29,30,59,30,30,29,30,29,29,30), //六月30 闰六月29
  array(47,30,29,30,29,30,29,30,30,29,30,30,29),
  array(36,30,29,29,30,29,30,29,30,29,30,30,30),
  array(26,29,30,29,29,59,29,30,29,30,30,30,30,30), //五月30 闰五月29
  array(45,29,30,29,29,30,29,29,30,29,30,30,30),
  array(34,29,30,30,29,29,30,29,29,30,29,30,30),
  array(22,29,30,59,30,29,30,29,29,30,29,30,29,30), //三月30 闰三月29
  array(40,30,30,30,29,30,29,30,29,29,30,29,30),
  array(30,29,30,30,29,30,29,30,59,29,30,29,30,30), //八月30 闰八月29
  array(49,29,30,29,30,30,29,30,29,30,30,29,29),
  array(37,30,29,30,29,30,29,30,30,29,30,30,29),
  array(27,30,29,29,30,58,30,30,29,30,30,29,30,29), //五月29 闰五月29
  array(46,30,29,29,30,29,29,30,29,30,30,30,29),
  array(35,30,30,29,29,30,29,29,30,29,30,30,29),
  array(23,30,30,29,59,30,29,29,30,29,30,29,30,30), //四月30 闰四月29
  array(42,30,30,29,30,29,30,29,29,30,29,30,29),
  array(31,30,30,29,30,30,29,30,29,29,30,29,30),
  array(21,29,59,30,30,29,30,29,30,29,30,29,30,30), //二月30 闰二月29
  array(39,29,30,29,30,29,30,30,29,30,29,30,29),
  array(28,30,29,30,29,30,29,59,30,30,29,30,30,30), //七月30 闰七月29
  array(48,29,29,30,29,29,30,29,30,30,30,29,30),
  array(37,30,29,29,30,29,29,30,29,30,30,29,30),
  array(25,30,30,29,29,59,29,30,29,30,29,30,30,30), //五月30 闰五月29
  array(44,30,29,30,29,30,29,29,30,29,30,29,30),
  array(33,30,29,30,30,29,30,29,29,30,29,30,29),
  array(22,30,29,30,59,30,29,30,29,30,29,30,29,30), //四月30 闰四月29
  array(40,30,29,30,29,30,30,29,30,29,30,29,30),
  array(30,29,30,29,30,29,30,29,30,59,30,29,30,30), //九月30 闰九月29
  array(49,29,30,29,29,30,29,30,30,30,29,30,29),
  array(38,30,29,30,29,29,30,29,30,30,29,30,30),
  array(27,29,30,29,30,29,59,29,30,29,30,30,30,29), //六月29 闰六月30
  array(46,29,30,29,30,29,29,30,29,30,29,30,30),
  array(35,30,29,30,29,30,29,29,30,29,29,30,30),
  array(24,29,30,30,59,30,29,29,30,29,30,29,30,30), //四月30 闰四月29
  array(42,29,30,30,29,30,29,30,29,30,29,30,29),
  array(31,30,29,30,29,30,30,29,30,29,30,29,30),
  array(21,29,59,29,30,30,29,30,30,29,30,29,30,30), //二月30 闰二月29
  array(40,29,30,29,29,30,29,30,30,29,30,30,29),
  array(28,30,29,30,29,29,59,30,29,30,30,30,29,30), //六月30 闰六月29
  array(47,30,29,30,29,29,30,29,29,30,30,30,29),
  array(36,30,30,29,30,29,29,30,29,29,30,30,29),
  array(25,30,30,30,29,59,29,30,29,29,30,30,29,30), //五月30 闰五月29
  array(43,30,30,29,30,29,30,29,30,29,29,30,30),
  array(33,29,30,29,30,30,29,30,29,30,29,30,29),
  array(22,29,30,59,30,29,30,30,29,30,29,30,29,30), //三月30 闰三月29
  array(41,30,29,29,30,29,30,30,29,30,30,29,30),
  array(30,29,30,29,29,30,29,30,29,30,30,59,30,30), //十一月30 闰十一月29
  array(49,29,30,29,29,30,29,30,29,30,30,29,30),
  array(38,30,29,30,29,29,30,29,29,30,30,29,30),
  array(27,30,30,29,30,29,59,29,29,30,29,30,30,29), //六月29 闰六月30
  array(45,30,30,29,30,29,29,30,29,29,30,29,30),
  array(34,30,30,29,30,29,30,29,30,29,29,30,29),
  array(23,30,30,29,30,59,30,29,30,29,30,29,29,30), //五月30 闰五月29
  array(42,30,29,30,30,29,30,29,30,30,29,30,29),
  array(31,29,30,29,30,29,30,30,29,30,30,29,30),
  array(21,29,59,29,30,29,30,29,30,30,29,30,30,30), //二月30 闰二月29
  array(40,29,30,29,29,30,29,29,30,30,29,30,30),
  array(29,30,29,30,29,29,30,58,30,29,30,30,30,29), //七月29 闰七月29
  array(47,30,29,30,29,29,30,29,29,30,29,30,30),
  array(36,30,29,30,29,30,29,30,29,29,30,29,30),
  array(25,30,29,30,30,59,29,30,29,29,30,29,30,29), //五月29 闰五月30
  array(44,29,30,30,29,30,30,29,30,29,29,30,29),
  array(32,30,29,30,29,30,30,29,30,30,29,30,29),
  array(22,29,30,59,29,30,29,30,30,29,30,30,29,29), //三月29 闰三月30
  );
  //是否闰年
  private function IsLeapYear($AYear)
  {
  return ($AYear % 4 == 0) && (($AYear % 100 != 0) || ($AYear % 400 == 0));
  }
  //公历该月的天数(year：年份； month：月份)
  private function GetSMon($year,$month)
  {
  if($this->IsLeapYear($year) && $month == 2)

  return 29; 

  else
  return $this->_SMDay[$month];
  }
  //农历名称转换
  private function LYearName($year)
  {
  $Name = array(“零”,”一”,”二”,”三”,”四”,”五”,”六”,”七”,”八”,”九”);
  for($i=0;$i<4;$i++)
  for($k=0;$k<10;$k++)

   if($year[$i]==$k) 
     $tmp.=$Name[$k]; 

  return $tmp;
  }
  private function LMonName($month)
  {
  if($month >=1 && $month <=12 )
  {
  $Name = array( 1=>”正”,”二”,”三”,”四”,”五”,”六”,”七”,”八”,”九”,”十”,”十一”,”十二”);
  return $Name[$month];
  }
  return $month;
  }
  private function LDayName($day)
  {
  if($day >=1 && $day <=30 )
  {

  $Name = array( 1 => 

  “初一”,”初二”,”初三”,”初四”,”初五”,”初六”,”初七”,”初八”,”初九”,”初十”,

  "十一","十二","十三","十四","十五","十六","十七","十八","十九","二十", 
  "廿一","廿二","廿三","廿四","廿五","廿六","廿七","廿八","廿九","三十" 
  ); 
  return $Name[$day]; 

  }
  return $day;
  }
  //公历转农历(Sdate：公历日期)
  public function S2L($date)
  {
  list($year, $month, $day) = explode(“-“, $date);
  if($year <= 1951 || $month <= 0 || $day <= 0 || $year >= 2051 ) return false;
  //获取查询日期到当年1月1日的天数
  $date1 = strtotime($year.”-01-01”);//当年1月1日
  $date2 = strtotime($year.”-“.$month.”-“.$day);
  $days=round(($date2-$date1)/3600/24);
  $days += 1;
  //获取相应年度农历数据，化成数组Larray
  $Larray = $this->LMDay[$year - $this->LStart];
  if($days <= $Larray[0])
  {

  $Lyear = $year - 1; 

  $days = $Larray[0] - $days;
  $Larray = $this->LMDay[$Lyear - $this->LStart];

  if($days < $Larray[12]) 

  {

    $Lmonth = 12; 
    $Lday = $Larray[12] - $days; 
  } 
  else

  {

   $Lmonth = 11; 
   $days = $days - $Larray[12]; 
    $Lday = $Larray[11] - $days; 

  }
  }
  else
  {

  $Lyear = $year; 
  $days = $days - $Larray[0]; 
  for($i = 1;$i <= 12;$i++) 
  { 
    if($days > $Larray[$i]) $days = $days - $Larray[$i]; 
   else 
    { 
     if ($days > 30){ 
        $days = $days - $Larray[13]; 
        $Ltype = 1; 
     } 
     $Lmonth = $i; 
     $Lday = $days; 
      break; 
    } 

  }
  }
  return mktime(0, 0, 0, $Lmonth, $Lday, $Lyear);
  //$Ldate = $Lyear.”-“.$Lmonth.”-“.$Lday;
  //$Ldate = $this->LYearName($Lyear).”年”.$this->LMonName($Lmonth).”月”.$this->LDayName($Lday);
  //if($Ltype) $Ldate.=”(闰)”;
  //return $Ldate;
  }
  //农历转公历(date：农历日期； type：是否闰月)
  public function L2S($date,$type = 0)
  {
  list($year, $month, $day) = split(“-“,$date);
  if($year <= 1951 || $month <= 0 || $day <= 0 || $year >= 2051 ) return false;
  $Larray = $this->LMDay[$year - $this->LStart];
  if($type == 1 && count($Larray)<=12 ) return false;//要求查询闰，但查无闰月
  //如果查询的农历是闰月并该年度农历数组存在闰月数据就获取
  if($Larray[$month]>30 && $type == 1 && count($Larray) >=13) $day = $Larray[13] + $day;
  //获取该年农历日期到公历1月1日的天数
  $days = $day;
  for($i=0;$i<=$month-1;$i++)

  $days += $Larray[$i]; 

  //当查询农历日期距离公历1月1日超过一年时
  if($days > 366 || ($this->GetSMon($month,2)!=29 && $days>365 ))
  {

  $Syear = $year +1; 

  if($this->GetSMon($month,2)!=29)

   $days-=366; 
  else
   $days-=365; 
  if($days > $this->_SMDay[1]) 
  { 
   $Smonth = 2; 
    $Sday = $days - $this->_SMDay[1]; 

  }

  else

  {

    $Smonth = 1; 
    $Sday = $days; 
  }    

  }
  else
  {

  $Syear =$year; 

  for($i=1;$i<=12;$i++)

  { 
   if($days > $this->GetSMon($Syear,$i)) 
     $days-=$this->GetSMon($Syear,$i); 
    else
    { 
     $Smonth = $i; 
     $Sday = $days; 
     break; 
    } 
  } 

  }
  return mktime(0, 0, 0, $Smonth, $Sday, $Syear);
  //$Sdate = $Syear.”-“.$Smonth.”-“.$Sday;
  //return $Sdate;
  }
  }
  ?>

  teacher.php
  //公历转农历
  require_once(CORE_.”Lunar.php”); // 加载lunar.php文件
  $today = date(“Y-m-d”);
  $lunar = new Lunar(); // 实例化类
  $nonglitime = array();
  $nl = date(“Y-n-d”,$lunar->S2L($today));
  echo $nl;exit; // 转为农历是:2012-05-25